you can get a cheap dye penetrant kit at walkin part stores, or on line, if you don't care to deal with exchange, also, if they reject your request for replacement, you can do the dye penetrant check and have a good case before the court

 

Not recommended on di-cast parts!!!!!!!!!!! Big NO NO. will only show smears and stain to a point where you won't be able to justify a return..

Unless you are a professional... no matter what you do to test for a crack will not stand up in any court in the land... Has to be a "certified profession"..

 

After looking at the pics, I think you should make a "bowel movement" to the dealer for a replacement.

 

Instead of dye penetrant try this.
Go to a shop that turns brake drums and rotors.
Get a cupful of the powder (it's iron).
spread a thin layer along the suspected crack.
Take a strong magnet (preferably horsehoe style) and place
on back side of suspected crack.
The powder will line up on opposite sides if a crack exists.
this is a cheapy way, but it will help confirm if a crack exists.
Remove magnet and wipe off dust, no telltale signs left and no damage
is done.

 

I started scrolling down and for a while there I thought nobody was gonna' take advantage of this.

 

I've been noticing myself that some of the parts lately have been less than stellar quality from HD. I have a sissy bar with some serious chrome missing on the backside.

Me thinks they have a QA problem.